One that asks only what applies to this client, can be completed without signing up for anything, and has been checked before it is sent. That is what we built Brief Builder to do.
What we built, and why
Ask only what applies. A brief starts from the project type, which decides the sections suggested first, and conditional questions appear only when an earlier answer makes them relevant.
Never guess. A question is shown only when its rule is definitely true. Rules may only refer to earlier questions, and broken rules are flagged in Review before anything is exported.
Remove friction for the client. The brief goes out as a fillable PDF that opens in any PDF reader: no account, no portal.
Keep it private by default. Briefs stay in the freelancer’s browser unless they choose the optional cloud storage; backups are files they keep themselves.
Limits
PDF viewers can’t reliably hide fields, so conditional questions appear in the PDF with a short note instead of disappearing. And because local briefs live in one browser, backups matter.